From 2112972a646f2ff273339ec45be71fdb188a2d46 Mon Sep 17 00:00:00 2001
From: bjorn3 <bjorn3@users.noreply.github.com>
Date: Wed, 31 Jul 2019 13:48:46 +0200
Subject: [PATCH] Use <i64>::swap_bytes instead of llvm.bswap.i64

---
 library/stdarch/crates/core_arch/src/x86_64/bswap.rs | 8 +-------
 1 file changed, 1 insertion(+), 7 deletions(-)

diff --git a/library/stdarch/crates/core_arch/src/x86_64/bswap.rs b/library/stdarch/crates/core_arch/src/x86_64/bswap.rs
index 9e8e76d4f706..81ecbc2290e7 100644
--- a/library/stdarch/crates/core_arch/src/x86_64/bswap.rs
+++ b/library/stdarch/crates/core_arch/src/x86_64/bswap.rs
@@ -12,13 +12,7 @@ use stdarch_test::assert_instr;
 #[cfg_attr(test, assert_instr(bswap))]
 #[stable(feature = "simd_x86", since = "1.27.0")]
 pub unsafe fn _bswap64(x: i64) -> i64 {
-    bswap_i64(x)
-}
-
-#[allow(improper_ctypes)]
-extern "C" {
-    #[link_name = "llvm.bswap.i64"]
-    fn bswap_i64(x: i64) -> i64;
+   x.swap_bytes()
 }
 
 #[cfg(test)]